/*
* Mac Mini "toonie" mixer control
*
* Copyright (c) 2005 by Benjamin Herrenschmidt <benh@kernel.crashing.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <sound/driver.h>
#include <linux/init.h>
#include <linux/delay.h>
#include <linux/i2c.h>
#include <linux/i2c-dev.h>
#include <linux/kmod.h>
#include <linux/slab.h>
#include <linux/interrupt.h>
#include <sound/core.h>
#include <asm/io.h>
#include <asm/irq.h>
#include <asm/machdep.h>
#include <asm/pmac_feature.h>
#include "pmac.h"
#undef DEBUG
#ifdef DEBUG
#define DBG(fmt...) printk(fmt)
#else
#define DBG(fmt...)
#endif
struct pmac_gpio {
unsigned int addr;
u8 active_val;
u8 inactive_val;
u8 active_state;
};
struct pmac_toonie
{
struct pmac_gpio hp_detect_gpio;
struct pmac_gpio hp_mute_gpio;
struct pmac_gpio amp_mute_gpio;
int hp_detect_irq;
int auto_mute_notify;
struct work_struct detect_work;
};
/*
* gpio access
*/
#define do_gpio_write(gp, val) \
pmac_call_feature(PMAC_FTR_WRITE_GPIO, NULL, (gp)->addr, val)
#define do_gpio_read(gp) \
pmac_call_feature(PMAC_FTR_READ_GPIO, NULL, (gp)->addr, 0)
#define tumbler_gpio_free(gp) /* NOP */
static void write_audio_gpio(struct pmac_gpio *gp, int active)
{
if (! gp->addr)
return;
active = active ? gp->active_val : gp->inactive_val;
do_gpio_write(gp, active);
DBG("(I) gpio %x write %d\n", gp->addr, active);
}
static int check_audio_gpio(struct pmac_gpio *gp)
{
int ret;
if (! gp->addr)
return 0;
ret = do_gpio_read(gp);
return (ret & 0xd) == (gp->active_val & 0xd);
}
static int read_audio_gpio(struct pmac_gpio *gp)
{
int ret;
if (! gp->addr)
return 0;
ret = ((do_gpio_read(gp) & 0x02) !=0);
return ret == gp->active_state;
}
enum { TOONIE_MUTE_HP, TOONIE_MUTE_AMP };
static int toonie_get_mute_switch(snd_kcontrol_t *kcontrol,
snd_ctl_elem_value_t *ucontrol)
{
pmac_t *chip = snd_kcontrol_chip(kcontrol);
struct pmac_toonie *mix = chip->mixer_data;
struct pmac_gpio *gp;
if (mix == NULL)
return -ENODEV;
switch(kcontrol->private_value) {
case TOONIE_MUTE_HP:
gp = &mix->hp_mute_gpio;
break;
case TOONIE_MUTE_AMP:
gp = &mix->amp_mute_gpio;
break;
default:
return -EINVAL;;
}
ucontrol->value.integer.value[0] = !check_audio_gpio(gp);
return 0;
}
static int toonie_put_mute_switch(snd_kcontrol_t *kcontrol,
snd_ctl_elem_value_t *ucontrol)
{
pmac_t *chip = snd_kcontrol_chip(kcontrol);
struct pmac_toonie *mix = chip->mixer_data;
struct pmac_gpio *gp;
int val;
if (chip->update_automute && chip->auto_mute)
return 0; /* don't touch in the auto-mute mode */
if (mix == NULL)
return -ENODEV;
switch(kcontrol->private_value) {
case TOONIE_MUTE_HP:
gp = &mix->hp_mute_gpio;
break;
case TOONIE_MUTE_AMP:
gp = &mix->amp_mute_gpio;
break;
default:
return -EINVAL;;
}
val = ! check_audio_gpio(gp);
if (val != ucontrol->value.integer.value[0]) {
write_audio_gpio(gp, ! ucontrol->value.integer.value[0]);
return 1;
}
return 0;
}
static snd_kcontrol_new_t toonie_hp_sw __initdata = {
.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
.name = "Headphone Playback Switch",
.info = snd_pmac_boolean_mono_info,
.get = toonie_get_mute_switch,
.put = toonie_put_mute_switch,
.private_value = TOONIE_MUTE_HP,
};
static snd_kcontrol_new_t toonie_speaker_sw __initdata = {
.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
.name = "PC Speaker Playback Switch",
.info = snd_pmac_boolean_mono_info,
.get = toonie_get_mute_switch,
.put = toonie_put_mute_switch,
.private_value = TOONIE_MUTE_AMP,
};
/*
* auto-mute stuffs
*/
static int toonie_detect_headphone(pmac_t *chip)
{
struct pmac_toonie *mix = chip->mixer_data;
int detect = 0;
if (mix->hp_detect_gpio.addr)
detect |= read_audio_gpio(&mix->hp_detect_gpio);
return detect;
}
static void toonie_check_mute(pmac_t *chip, struct pmac_gpio *gp, int val,
int do_notify, snd_kcontrol_t *sw)
{
if (check_audio_gpio(gp) != val) {
write_audio_gpio(gp, val);
if (do_notify)
snd_ctl_notify(chip->card, SNDRV_CTL_EVENT_MASK_VALUE,
&sw->id);
}
}
static void toonie_detect_handler(void *self)
{
pmac_t *chip = (pmac_t*) self;
struct pmac_toonie *mix;
int headphone;
if (!chip)
return;
mix = chip->mixer_data;
snd_assert(mix, return);
headphone = toonie_detect_headphone(chip);
DBG("headphone: %d, lineout: %d\n", headphone, lineout);
if (headphone) {
/* unmute headphone/lineout & mute speaker */
toonie_check_mute(chip, &mix->hp_mute_gpio, 0,
mix->auto_mute_notify, chip->master_sw_ctl);
toonie_check_mute(chip, &mix->amp_mute_gpio, 1,
mix->auto_mute_notify, chip->speaker_sw_ctl);
} else {
/* unmute speaker, mute others */
toonie_check_mute(chip, &mix->amp_mute_gpio, 0,
mix->auto_mute_notify, chip->speaker_sw_ctl);
toonie_check_mute(chip, &mix->hp_mute_gpio, 1,
mix->auto_mute_notify, chip->master_sw_ctl);
}
if (mix->auto_mute_notify) {
snd_ctl_notify(chip->card, SNDRV_CTL_EVENT_MASK_VALUE,
&chip->hp_detect_ctl->id);
}
}
static void toonie_update_automute(pmac_t *chip, int do_notify)
{
if (chip->auto_mute) {
struct pmac_toonie *mix;
mix = chip->mixer_data;
snd_assert(mix, return);
mix->auto_mute_notify = do_notify;
schedule_work(&mix->detect_work);
}
}
/* interrupt - headphone plug changed */
static irqreturn_t toonie_hp_intr(int irq, void *devid, struct pt_regs *regs)
{
pmac_t *chip = devid;
if (chip->update_automute && chip->initialized) {
chip->update_automute(chip, 1);
return IRQ_HANDLED;
}
return IRQ_NONE;
}
/* look for audio gpio device */
static int find_audio_gpio(const char *name, const char *platform,
struct pmac_gpio *gp)
{
struct device_node *np;
u32 *base, addr;
if (! (np = find_devices("gpio")))
return -ENODEV;
for (np = np->child; np; np = np->sibling) {
char *property = get_property(np, "audio-gpio", NULL);
if (property && strcmp(property, name) == 0)
break;
if (device_is_compatible(np, name))
break;
}
if (np == NULL)
return -ENODEV;
base = (u32 *)get_property(np, "AAPL,address", NULL);
if (! base) {
base = (u32 *)get_property(np, "reg", NULL);
if (!base) {
DBG("(E) cannot find address for device %s !\n", name);
return -ENODEV;
}
addr = *base;
if (addr < 0x50)
addr += 0x50;
} else
addr = *base;
gp->addr = addr & 0x0000ffff;
/* Try to find the active state, default to 0 ! */
base = (u32 *)get_property(np, "audio-gpio-active-state", NULL);
if (base) {
gp->active_state = *base;
gp->active_val = (*base) ? 0x5 : 0x4;
gp->inactive_val = (*base) ? 0x4 : 0x5;
} else {
u32 *prop = NULL;
gp->active_state = 0;
gp->active_val = 0x4;
gp->inactive_val = 0x5;
/* Here are some crude hacks to extract the GPIO polarity and
* open collector informations out of the do-platform script
* as we don't yet have an interpreter for these things
*/
if (platform)
prop = (u32 *)get_property(np, platform, NULL);
if (prop) {
if (prop[3] == 0x9 && prop[4] == 0x9) {
gp->active_val = 0xd;
gp->inactive_val = 0xc;
}
if (prop[3] == 0x1 && prop[4] == 0x1) {
gp->active_val = 0x5;
gp->inactive_val = 0x4;
}
}
}
DBG("(I) GPIO device %s found, offset: %x, active state: %d !\n",
name, gp->addr, gp->active_state);
return (np->n_intrs > 0) ? np->intrs[0].line : 0;
}
static void toonie_cleanup(pmac_t *chip)
{
struct pmac_toonie *mix = chip->mixer_data;
if (! mix)
return;
if (mix->hp_detect_irq >= 0)
free_irq(mix->hp_detect_irq, chip);
kfree(mix);
chip->mixer_data = NULL;
}
int snd_pmac_toonie_init(pmac_t *chip)
{
struct pmac_toonie *mix;
mix = kmalloc(sizeof(*mix), GFP_KERNEL);
if (! mix)
return -ENOMEM;
chip->mixer_data = mix;
chip->mixer_free = toonie_cleanup;
find_audio_gpio("headphone-mute", NULL, &mix->hp_mute_gpio);
find_audio_gpio("amp-mute", NULL, &mix->amp_mute_gpio);
mix->hp_detect_irq = find_audio_gpio("headphone-detect",
NULL, &mix->hp_detect_gpio);
strcpy(chip->card->mixername, "PowerMac Toonie");
chip->master_sw_ctl = snd_ctl_new1(&toonie_hp_sw, chip);
snd_ctl_add(chip->card, chip->master_sw_ctl);
chip->speaker_sw_ctl = snd_ctl_new1(&toonie_speaker_sw, chip);
snd_ctl_add(chip->card, chip->speaker_sw_ctl);
INIT_WORK(&mix->detect_work, toonie_detect_handler, (void *)chip);
if (mix->hp_detect_irq >= 0) {
snd_pmac_add_automute(chip);
chip->detect_headphone = toonie_detect_headphone;
chip->update_automute = toonie_update_automute;
toonie_update_automute(chip, 0);
if (request_irq(mix->hp_detect_irq, toonie_hp_intr, 0,
"Sound Headphone Detection", chip) < 0)
mix->hp_detect_irq = -1;
}
return 0;
}
